To sprout: You rinse them a few times in cold water before letting them sit over night in a bowl to expand and soak. Inspect and take out the split beans. After at least 8 hours place them in a jar, put cheesecloth over the top, and a tight rubberband. 1 cup of lentils per 1/2 quart jar. Fill it no more than 1/3 of the way so there is adequate space for growth. Give them a rinse with cold water, and drain. Rinse and drain again that night. Do not leave any large puddles in the bottom of the jar. Let them drain well, and do this over and over for the next 4 days. Once in the morning, and again at night. On the 4th day let them sit in the windowsill to increase their chlorophyll, and on the 5th day they are ready to be eaten, and stored in the fridge in a ziplock bag with a paper towel lining. They will keep for about a week. Enjoy raw or in soups and salads!
There you go! Read more about what exactly you can sprout here and get started!
Second set of photo's by Honest Fare- source is here.
Read in great detail how and why there are so many health benefits of sprouting here.